§ 21.96. Ammonia, aqueous.
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/us/cfr/t27/s§ 21.96·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
(a)Alkalinity. Strongly alkaline to litmus.
(b)Ammonia content. 27 to 30 percent by weight. Accurately weigh a glass-stoppered flask containing 25 mL of water, add about 2 mL of the sample, stopper, and weigh again. Add methyl red indicator, and titrate with 1 N sulfuric acid. Each mL of 1 N sulfuric acid is equivalent to 17.03 mg of NH3
(c)Color. Colorless liquid.
(d)Non-volatile residue. 2 mg maximum. Dilute a portion of the sample with 1 1/2 times its volume of distilled water. Evaporate 10 mL of this product to dryness in a tared platinum or porcelain dish. Dry residue at 105 °C. for 1 hour, cool and weigh.
(e)Odor. Characteristic (exceedingly pungent).
(f)Specific gravity at 20 °/4 °C. 0.8920 to 0.9010. \[T.D. ATF-133, 48 FR 24673, June 2, 1983. Redesignated by T.D. ATF-442, 66 FR 12854, Mar. 1, 2001\]